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| author | Daniel Schwierzeck <daniel.schwierzeck@gmail.com> | 2015-02-22 16:58:30 +0100 |
|---|---|---|
| committer | Daniel Schwierzeck <daniel.schwierzeck@gmail.com> | 2015-04-24 12:15:34 +0200 |
| commit | 90b1c9fad7bde21e3f0d388d0ba0ac5ee1f2e976 (patch) | |
| tree | 2bd21a8949cb93556cc580e3ea838923324423dd /arch/mips | |
| parent | d8c1d5d5fb6eafbc532982125f006e49f2c40e71 (diff) | |
MIPS: implement device-tree handover to Linux kernel
Add device-tree handover to Linux kernel conforming with MIPS UHI [1].
Register $a0 will be set to the reserved value -2. The address of
the device-tree blob will be stored as KSEG0 address in $a1. $a2 and
$a3 are set to zero.
[1] http://prplfoundation.org/wiki/MIPS_documentation
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/Kconfig | 9 | ||||
| -rw-r--r-- | arch/mips/lib/bootm.c | 6 |
2 files changed, 8 insertions, 7 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index bc4283d2f13..b0a8a4357a4 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -141,15 +141,12 @@ config MIPS_BOOT_ENV_LEGACY The address of the enviroment is stored in register $a2. config MIPS_BOOT_FDT - bool "Hand over a flattened device tree to Linux kernel (INCOMPLETE)" + bool "Hand over a flattened device tree to Linux kernel" default n help Enable this option if you want U-Boot to hand over a flattened - device tree to the kernel. - - Note: the final hand over to the kernel is not yet implemented. After - the community agreed on the MIPS boot interface for device trees, - the corresponding code will be added. + device tree to the kernel. According to UHI register $a0 will be set + to -2 and the FDT address is stored in $a1. endmenu diff --git a/arch/mips/lib/bootm.c b/arch/mips/lib/bootm.c index d9d8396e63b..e289799c1ee 100644 --- a/arch/mips/lib/bootm.c +++ b/arch/mips/lib/bootm.c @@ -317,7 +317,11 @@ static void boot_jump_linux(bootm_headers_t *images) bootstage_report(); #endif - kernel(linux_argc, (ulong)linux_argv, (ulong)linux_env, linux_extra); + if (images->ft_len) + kernel(-2, (ulong)images->ft_addr, 0, 0); + else + kernel(linux_argc, (ulong)linux_argv, (ulong)linux_env, + linux_extra); } int do_bootm_linux(int flag, int argc, char * const argv[], |